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Yeah, that's exactly what happened but not sure if the bearing cooled the case or the case heated the bearings.  When i pulled out the bearings to redo, they were quite hot and they weren't in that long (and not fully in either).  I think in terms of mass and thermal inertia, the bearings are apt to heat/cool faster than the case because they have less mass.  So that would mean the bearings heat more than the case cools.